Affiliation:
1. CAS Key Laboratory of Low‐Carbon Conversion Science and Engineering Shanghai Advanced Research Institute (SARI) Chinese Academy of Sciences (CAS) Shanghai 201210 P. R. China
2. School of Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China
Abstract
AbstractDual‐atom catalysts exhibit higher reactivity and selectivity than the single‐atom catalysts. The pyrolysis of bimetal salt precursors is the most typical method for synthesizing dual‐atomic catalysts; however, the finiteness of bimetal salts limits the variety of dual‐atomic catalysts. In this study, a confined synthesis strategy for synthesizing dual‐atomic catalysts is developed. Owing to the in situ synthesis of zeolitic imidazolate frameworks in the pores of covalent organic frameworks (COFs), the migration and aggregation of metal atoms are suppressed adequately during the pyrolysis process. The resultant catalyst contains abundant Zn─Co dual atomic sites with 2.8 wt.% Zn and 0.5 wt.% Co. The catalyst exhibits high reactivity toward oxygen reduction reaction with a half‐wave potential of 0.86 V, which is superior to that of the commercial Pt/C catalyst. Theoretical calculations reveal that the Zn atoms in the Zn─Co dual atomic sites promote the formation of intermediate OOH*, and thus contribute to high catalytic performance. This study provides new insights into the design of dual‐atom catalysts using COFs.
Funder
National Natural Science Foundation of China
Science and Technology Commission of Shanghai Municipality
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
4 articles.
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